simpel tone / beep on stm32F7 with wm8994

[hjh]

Posted on August 05, 2015 at 22:25

Hi guys

I try to make a simpel sinusial tone / beep on the STM32F7-Discovery borad but can not find a solution.

Do anybody have the time to show howto ?

Hjalmar

[hjh]

Posted on August 13, 2015 at 13:01

hi guys 

Do Anybody have a simpel way to make a tone / a beep on the stm32f7 with the wm8994 on..

I try something with :

This one give me a tone, but it do not stop...it continue and the stm32f7 do frezee ........anybody with an idea ?

1. include ''stm32746g_discovery_audio.h''
2. include ''stm32f7xx_hal_sai.h''
3. include ''stm32f7xx_hal_i2s.h''
4. include ''main.h''
5. include ''GUI.h''
6. include ''DIALOG.h''
7. include ''WM.h''

//Sin table values 

uint16_t Sine550hz

http://www.openstm32.org/128

 = { 32767, 39811, 46526, 52597, 57741, 

61717, 64340, 65486, 65102, 63207, 

59888, 55301, 49660, 43230, 36310, 

29224, 22304, 15874, 10233, 5646, 

2327, 432, 48, 1194, 3817, 7793, 

12937, 19008, 25723, 

32767, 39811, 46526, 52597, 57741, 

61717, 64340, 65486, 65102, 63207, 

59888, 55301, 49660, 43230, 36310, 

29224, 22304, 15874, 10233, 5646, 

2327, 432, 48, 1194, 3817, 7793, 

12937, 19008, 25723, 

32767, 39811, 46526, 52597, 57741, 

61717, 64340, 65486, 65102, 63207, 

59888, 55301, 49660, 43230, 36310, 

29224, 22304, 15874, 10233, 5646, 

2327, 432, 48, 1194, 3817, 7793, 

12937, 19008, 25723, 

32767, 39811, 46526, 52597, 57741, 

61717, 64340, 65486, 65102, 63207, 

59888, 55301, 49660, 43230, 36310, 

29224, 22304, 15874, 10233, 5646, 

2327, 432, 48, 1194, 3817, 7793, 

12937, 19008, 25723};

static __IO uint32_t hjhVolume = 35;

void hjhAudioInit() 

{ 

BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_BOTH, hjhVolume, I2S_AUDIOFREQ_8K); 

BSP_AUDIO_OUT_SetAudioFrameSlot(CODEC_AUDIOFRAME_SLOT_02); 

} 

void hjhAudioTone(){ 

BSP_AUDIO_OUT_SetVolume(hjhVolume); 

int res = BSP_AUDIO_OUT_Play((uint16_t*)&Sine550hz

http://www.openstm32.org/0

,sizeof(Sine550hz)); 

GUI_DispDecAt(res, 0, 60,5); 

}

void BSP_AUDIO_OUT_TransferComplete_CallBack() 

{ 

BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW); 

}

[Amel NASRI]

Posted on August 13, 2015 at 13:12

Hi skovholm_hansen.hjal,

wm8994 is used in the example available under STM32Cube_FW_F7_V1.1.0\Projects\STM32746G-Discovery\Applications\Audio\Audio_playback_and_record.

If you can check how this example was implemented, it may bring you some help.

-Mayla-

[hjh]

Posted on August 13, 2015 at 20:51

Hi mayla

I did ...but it takes a file and i can not figure out why it do continue in my code when it have played the array....I am newbie to stm32f7 so mabye thats the reason ;o)

I did hope that somebody did have a quick fix otherwise i will make my own code to talk to the wm8994 but it is not easy so therefore i did want to use HAL ...

Best regards

Hjalmar

[misterstarshine]

Posted on September 16, 2016 at 16:15

Hi.

I've tried that code example you provided and can confirm that it does indeed seem to freeze the board. Have you sorted it out? I'm on the hunt for a very simple example that outputs stereo audio from a memory buffer but with no success.